When I'm out walking Lucy, who's 13 weeks old, I notice that she tends to want to chase cars. Of course I don't let her, and I correct her sharply when she tries. It seems to be getting better, but is there anything else I should be doing? Do you think this is puppy behavior or will she be a car chasing nut as an adult? Her breeder lives on a farm, and the socialization involved many people coming in, not a lot of the pups getting out, so I wonder if that's part of it.